Thanks got that all working fine.
Next question, how do you stop the angled wall modifiers changing the ceiling tiles as well?
EDIT: Didn't realise you could use floor tiles on different heights!
Yeah. Ceiling is basically just a floor tile on the higher floor (heck, why do we have the same word for two different things?). I forgot to mentuon a few things in the manual, but it will be added later.
